▎ 摘　　要

NOVELTY - Fluorine-free solar battery back plate comprises inner layer and outer layer from inside to outside; the raw material for preparing the inner layer includes polyolefin; the raw material for preparing the outer layer includes polyolefin and inorganic auxiliary agent. USE - The battery back plate is useful in solar cell module (claimed). ADVANTAGE - The battery back plate: excellent water vapor barrier property, toughness and interlayer peeling property. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the fluorine-free solar battery back plate comprising (1) stirring and mixing the materials in inner layer at speed of 500-1000 revolutions/minute according to the above-mentioned ratio to obtain premix, conveying the prepared premix to granulating extruder, extruding and granulating at 180-240 degrees C to prepare compound-A, (2) stirring and mixing the materials in the outer layer at speed of 500-1000 revolutions/minute according to the above-mentioned ratio to obtain premix, conveying the prepared premix to granulating extruder, extruding and granulating at 180-240 degrees C to prepare compound-B, and (3) respectively transferring the prepared compound-A and compound-B to extruder-A and extruder-B of co-extrusion backplane production line, melting, plasticizing, extruding through common rectangular mold to obtain sheet-type melt, cooling and shaping the sheet-type melt by cooling roller, rolling or cutting sheet, obtaining fluoride-free solar battery back plate; and (2) solar cell module comprising the fluorine-free solar cell back plate or composite back plate made of fluorine-free solar cell back plate.